US4951955A - Chuck for tools - Google Patents

Chuck for tools Download PDF

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Publication number
US4951955A
US4951955A US07/362,433 US36243389A US4951955A US 4951955 A US4951955 A US 4951955A US 36243389 A US36243389 A US 36243389A US 4951955 A US4951955 A US 4951955A
Authority
US
United States
Prior art keywords
rotating
rotating member
rotating nut
chuck
jaws
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/362,433
Other languages
English (en)
Inventor
Iwao Sakamaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sakamaki Mfg Co Ltd
Original Assignee
Sakamaki Mfg Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sakamaki Mfg Co Ltd filed Critical Sakamaki Mfg Co Ltd
Assigned to SAKAMAKI MFG. CO., LTD. reassignment SAKAMAKI MFG. CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SAKAMAKI, IWAO
Application granted granted Critical
Publication of US4951955A publication Critical patent/US4951955A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/1207—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving obliquely to the axis of the chuck in a plane containing this axis
    • B23B31/1238—Jaws movement actuated by a nut with conical screw-thread
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/1207—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving obliquely to the axis of the chuck in a plane containing this axis
    • B23B31/123—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving obliquely to the axis of the chuck in a plane containing this axis with locking arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2231/00—Details of chucks, toolholder shanks or tool shanks
    • B23B2231/12—Chucks having means to amplify the force produced by the actuating means to increase the clamping force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2231/00—Details of chucks, toolholder shanks or tool shanks
    • B23B2231/38—Keyless chucks for hand tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2260/00—Details of constructional elements
    • B23B2260/044—Clutches
    • B23B2260/0445—Overload clutches
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S279/00—Chucks or sockets
    • Y10S279/902—Keyless type socket
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/17—Socket type
    • Y10T279/17615—Obliquely guided reciprocating jaws
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/17—Socket type
    • Y10T279/17615—Obliquely guided reciprocating jaws
    • Y10T279/17623—Threaded sleeve and jaw
    • Y10T279/17632—Conical sleeve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/27—Separate chuck-actuating power source

Definitions

  • the present invention relates to a chuck for a tool such as a drill.
  • FIGS. 10 and 11 show a conventional chuck for a tool of the above-described type.
  • This chuck includes a chuck body 1, three jaws 2 mounted on the chuck body 1, a rotating member 3 and a rotating nut 4 threadingly engaged with the jaws 2.
  • the jaws 2 are caused to slide in a slanted attitude and thereby contract and expand due to the threaded engagement of the jaws 2 with the rotating nut 4 by rotating the rotating member 3.
  • the jaws 2 contract and a tool W is thereby fastened when an operator grips and rotates the rotating member 3. Further, the jaws 2 are also caused to contract so as to fasten the tool W by rotating the chuck body 1.
  • Rotation of the chuck body 1 is achieved by fixing a spindle 7 such as an electric drill to a mounting portion 5 of the chuck body 1 and by rotating the spindle 7 while the rotating member 3 is being held stationary by an operator.
  • the fastening force of the tool W is obtained by the interaction of the gripped force of the rotating member 3 and the rotating force of the chuck body 1, and this causes the tool to be fastened with an insufficient amount of force.
  • An object of the present invention is to provide a chuck for a tool which is capable of obviating the abovedescribed problem of the prior art.
  • the present invention provides a chuck for a tool in which a plurality of jaws mounted on a chuck body are caused to slide in a slanted attitute and thereby contract and expand by virtue of the threaded engagement of the jaws with a rotating nut by rotating a rotating member.
  • the chuck for the tool is characterized by the inclusion of a clutch mechanism which is provided between the rotating member and the rotating nut.
  • the transmission of power is intermittently cut off by the clutch mechanism, generating an impact force.
  • This impact force increases the amount of force with which the tool is fastened, and makes release of the tool smooth.
  • FIG. 1 is a cross-sectional view of a chuck, showing a first embodiment of the present invention
  • FIG. 2 is a section taken along the line A--A of FIG. 1, showing an annular body of a clutch mechanism
  • FIG. 3 is a section taken along the line B--B of FIG. 1, showing a rotating nut of the clutch mechanism
  • FIG. 4 is an enlarged cross-sectional view of the essential parts of the clutch mechanism
  • FIG. 5 is an enlarged cross-sectional view of an upper half of the chuck, showing the operation thereof;
  • FIG. 6 is a cross-sectional view of a chuck, showing a second embodiment of the present invention.
  • FIG. 7 is a section taken along the line A--A of FIG. 6;
  • FIG. 8 is a cross-sectional view of a chuck, showing a third embodiment of the present invention.
  • FIG. 9 is a cross-sectional view of a chuck, showing a fourth embodiment of the present invention.
  • FIG. 10 is a cross-sectional view of a conventional chuck.
  • FIG. 11 is a front view of the chuck of FIG. 10, with parts broken away for clarity.
  • a chuck has a chuck body 1, and three jaws 2 are mounted on this chuck body 1 in a radial form in such a manner that it can be caused to slide in a slanted attitude and thereby contract and expand.
  • a rotating member 3 and a rotating nut 4 are rotatably mounted on the chuck body 1.
  • the rotating nut 4 has grooves 4a, by which it is divided into two parts. These parts are assembled to form the rotating nut after being manufactured.
  • a form retaining ring 8 is fitted on the outer peripheral surface of the rotating nut 4 and has the function of maintaining the form of the rotating nut 4.
  • the inner surface of the rotating nut 4 is internally threaded, and this internal thread 9 is engaged with an external thread 10 formed on the outer peripheral surface of the jaws 2.
  • the outer peripheral surface of the rotating member 3 is provided with a plurality of recessed portions 11.
  • a washer plate 13 is located on the side of a flange portion 12 of the chuck body 1 which is closer to the rotating nut 4, and spherical bearing bodies 14 are provided between the washer plate 13 and the rotating nut 4.
  • a gripping ring 15 is fixed to the chuck body 1 in such a manner that it does not rotate.
  • the outer peripheral surface of the gripping ring 15 is provided with recessed portions 16.
  • a clutch mechanism 17 includes two recessed portions 4b and two convex portions 4c formed equiangularly on the rotating nut 4, two recessed portions 18a and two convex portions 18b formed on a ring body 18 around portions of its circumference respectively representing 150° and 30 ° of the 180° whole, which ring body is integrally formed with the rotating member 3, a locking ring 19 provided on the inner peripheral surface of the rear portion of the rotating member 3, and a clutch spring 20 provided between the form retaining ring 8 and the locking ring 19 for urging the rotating member 3 in the rightward direction as viewed in FIG. 1.
  • the jaws 2 are caused to slide in a slanted attitude and thereby expand so that the tool W can be removed by virtue of the threaded engagement of the rotating nut 4 with the jaws 2.
  • the convex portions 4c and 18b enter the recessed portions 4b and 18b under the action of the clutch spring 20, and the rotating member 3 moves back in the rightward direction. Thereafter, the convex portions 4c abut against and rise on the convex portions 18b again.
  • the impact force generated by the intermittent contact of the convex portions 4c with the convex portions 18b is exerted on the rotating nut 4 as a reaction force, increasing the amount of fastening force applied to the tool and making release of the tool W smooth.
  • a chuck has a chuck body 1, and three jaws 2 are mounted on this chuck body 1 in a radial form in such a manner that it can be caused to slide in a slanted attitude and thereby contract and expand. Further, a rotating member 3 and a rotating nut 4 are rotatably mounted on the chuck body 1.
  • the rotating nut 4 has grooves 4a, by which it is divided into two parts. These parts are assembled to form the rotating nut after being manufactured.
  • a form retaining ring 8 is fitted on the outer peripheral surface of the rotating nut 4 and has the function of maintaining the form of the rotating nut 4.
  • the inner peripheral surface of the form retaining ring 8 and the outer peripheral surface of the chuck body 1 are respectively provided with annular grooves la and 8a.
  • a plurality of spherical bearing bodies 14 are inserted between the annular grooves la and 8a from a ball inserting hole 21 formed in the form retaining ring 8 so that the form retaining ring 8 and the rotating nut 4 are supported by the bearing bodies 14 with respect to the chuck body 1 in the axial and rotational directions.
  • the ball inserting hole 21 is closed by a plug body 22.
  • a clutch mechanism 17 includes four convex portions 18b formed on an annular body 18 fitted in the rotating member 3, recessed portions 18a that form the portion other than the convex portions 18b, four convex portions 4c formed on the rotating nut 4, recessed portions 4b that form the portion other than the convex portions 4c, a locking portion 19 formed on the inner peripheral portion of the rear portion of the rotating member 3, and a clutch spring 20 provided between the form retaining ring 8 and the locking portion 19 for urging the rotating member 3 in the rightward direction as viewed in FIG. 6.
  • the impact force generated by the intermittent contact with the convex portions 4c with the convex portions 18b is exerted on the rotating nut 4 as a reaction force, as in the case of the first embodiment, increasing the amount of force with which the tool is fastened and making release of the tool W smooth.
  • a third embodiment of the present invention shown in FIG. 8 differs from the second embodiment shown in FIGS. 6 and 7 in that the annular body 18 is formed integrally with the rotating member 3, in that a cover 23 is fitted in the chuck body 1, and in that a locking ring 19 is mounted on the rotating member 3.
  • Other structure is the same as that of the second embodiment.
  • a fourth embodiment shown in FIG. 9 is similar to the embodiment shown in FIGS. 1 to 5.
  • a cover 23 is fitted in the chuck body 1. Further, an annular body 18 is eliminated and convex portions 18b and recessed portions 18a are directly formed in the rotating member 3, which, together with convex portions 4c and recessed portions 4b in the rotating nut 4, form a clutch mechanism 17. Other structure is the same as that of the embodiment shown in FIGS. 1 to 5.
  • This fourth embodiment is operated in the same manner in which any of the first, second and third embodiments is operated.
  • the numbers of convex portions 4c and 18b of the clutch mechanism 17 are not limited to those described above. Further, a clutch mechanism 17 having other structure may also be employed.
  • a chuck for a tool according to the present invention is most suitably used to tightly fasten a tool such as a drill and release the fastening of the tool.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)
US07/362,433 1987-10-16 1988-10-14 Chuck for tools Expired - Fee Related US4951955A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP62-261970 1987-10-16
JP26197087 1987-10-16

Publications (1)

Publication Number Publication Date
US4951955A true US4951955A (en) 1990-08-28

Family

ID=17369187

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/362,433 Expired - Fee Related US4951955A (en) 1987-10-16 1988-10-14 Chuck for tools

Country Status (6)

Country Link
US (1) US4951955A (de)
EP (1) EP0340310B1 (de)
JP (1) JPH029517A (de)
KR (1) KR890701259A (de)
DE (1) DE3874885T2 (de)
WO (1) WO1989003267A1 (de)

Cited By (54)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5125673A (en) * 1989-12-11 1992-06-30 Huff Robert O Non-impact keyless chuck
US5183274A (en) * 1991-06-13 1993-02-02 Yukiwa Seiko Kabushikikaisya Chuck for tools
US5215317A (en) * 1992-05-18 1993-06-01 Jacobs Chuck Technology Corp. Keyless chuck
US5234223A (en) * 1987-07-21 1993-08-10 Sakamaki Mfg. Co., Ltd. Chuck for tools
US5253879A (en) * 1989-12-11 1993-10-19 Jacobs Chuck Technology Corporation Non-impact keyless chuck
US5348318A (en) * 1993-08-13 1994-09-20 Jacobs Chuck Technology Corporation Chuck
US5348317A (en) * 1993-08-13 1994-09-20 Jacobs Chuck Technology Corporation Chuck
US5452906A (en) * 1989-12-11 1995-09-26 Jacobs Chuck Technology Corporation Non-impact keyless chuck
US5476273A (en) * 1989-12-11 1995-12-19 Power Tool Holders Incorporated Plastic grip boots for chucks
US5501473A (en) * 1993-08-13 1996-03-26 Power Tool Holders Incorporated Chuck
US5553873A (en) * 1994-07-01 1996-09-10 Power Tool Holders Incorporated Keyless chuck
US5573254A (en) * 1989-12-11 1996-11-12 Power Tool Holders Incorporated Non-impact keyless chuck
US5615899A (en) * 1994-08-31 1997-04-01 Yukiwa Seiko Kabushiki Kaisha Chuck apparatus
US5816584A (en) * 1997-01-02 1998-10-06 Power Tool Holders, Inc. Chuck with improved jaw bite
US5816583A (en) * 1996-12-04 1998-10-06 Power Tool Holders, Inc. Integral locking sleeve chuck
US5988653A (en) * 1998-06-18 1999-11-23 Chum Power Machinery Corp. Auto-locking bit holding system of a hand tool
US5992859A (en) * 1998-04-27 1999-11-30 Chum Power Machinery Corp. Bit holding system for a power hand tool
US6017039A (en) * 1997-11-03 2000-01-25 Power Tool Holders Incorporated Nosepiece nut retainer chuck
US6053675A (en) * 1998-06-26 2000-04-25 Black & Decker Inc. Quick-acting tool bit holder
US6073939A (en) * 1998-06-05 2000-06-13 Power Tool Holders Incorporated Locking chuck
US6182978B1 (en) * 1999-08-11 2001-02-06 Chun Chu Hsueh Self locking device for power tool
US6196554B1 (en) 1998-12-15 2001-03-06 Power Tool Holders Incorporated Locking chuck
US6247706B1 (en) * 1999-11-03 2001-06-19 Chum Power Machinery Corp. Self-locking chuck
US6257596B1 (en) * 1999-08-18 2001-07-10 Wen Yung Yang Self Locking device for power tool
US6354605B1 (en) 2000-03-10 2002-03-12 Power Tool Holders Incorporated Chuck with improved jaw
US6427555B2 (en) * 2000-02-23 2002-08-06 Rohm Gmbh Method of making drill-chuck jaw with hard-metal inserts
GB2377193A (en) * 1998-06-05 2003-01-08 Power Tool Holders Inc Keyless Chuck
US6540237B1 (en) 2000-06-23 2003-04-01 Power Tool Holders Incorporated Chuck
US20040021275A1 (en) * 2001-08-30 2004-02-05 Yukiwa Seiko Kabushiki Kaisha Keyless chuck and associated method
US20060038359A1 (en) * 2004-08-17 2006-02-23 Luckenbaugh Thomas L Keyless chuck with automatic and manual locking
US20060061048A1 (en) * 2004-09-20 2006-03-23 Daniel Puzio Tool chuck with power take off feature
US20060186611A1 (en) * 2005-02-18 2006-08-24 Gehret Robert S Non-slip reverse device for impacting-type chuck
US20060186612A1 (en) * 2005-02-18 2006-08-24 Daniel Puzio Dust cover for automatic chuck
US20060185870A1 (en) * 2005-02-18 2006-08-24 Black & Decker Inc. Drill chuck
US20060192352A1 (en) * 2005-02-09 2006-08-31 Gibbons Louis A Self-centering drill bit chuck
US20060244224A1 (en) * 2005-04-27 2006-11-02 Eastway Fair Company Limited Rotatable chuck
US20060244223A1 (en) * 2005-04-27 2006-11-02 Zhou Jin L Rotatable chuck
US20070052183A1 (en) * 2005-09-02 2007-03-08 Gregg Draudt Chuck with internal nut
US20070132196A1 (en) * 2005-04-19 2007-06-14 Daniel Puzio Tool chuck with power take off and dead spindle features
US20070158086A1 (en) * 2005-09-16 2007-07-12 Daniel Puzio Chuck with internally threaded jaw in a pto application
US20070170665A1 (en) * 2005-09-16 2007-07-26 Daniel Puzio Dead spindle pto with compliant grounding mechanism
US20070170664A1 (en) * 2005-09-16 2007-07-26 Daniel Puzio Pto selector mechanism for parallel axis transmission
US20070187908A1 (en) * 2005-09-16 2007-08-16 Daniel Puzio Pto selector mechanism with brake
US20080042375A1 (en) * 2006-08-15 2008-02-21 Jacobs Chuck Manufacturing Company Locking Chuck
US20090003950A1 (en) * 2007-06-26 2009-01-01 Kwok Ting Mok Multi-Speed Drill and Chuck Assembly
US20090200758A1 (en) * 2008-02-07 2009-08-13 Chin Hung Lam Auto Locking Chuck
US20090315279A1 (en) * 2008-06-18 2009-12-24 Jacobs Chuck Manufacturing Company Self tightening chuck with an axial lock
US20110000692A1 (en) * 2008-02-29 2011-01-06 Heiko Roehm Hand-held machine tool
US20110024997A1 (en) * 2009-07-29 2011-02-03 Yaksich Theodore G Self-tightening chuck with a radial lock
US8057134B2 (en) 2007-06-26 2011-11-15 Techtronic Power Tools Technology Limited Chuck assembly
US20120007322A1 (en) * 2009-04-30 2012-01-12 Kazuo Sakamaki Chuck device
US8616561B2 (en) 2012-04-10 2013-12-31 Apex Brands, Inc. Locking chuck
US9283625B2 (en) 2011-04-05 2016-03-15 Milwaukee Electric Tool Corporation Auto sizing chuck
US10556276B2 (en) 2013-03-14 2020-02-11 Apex Brands, Inc. Locking chuck

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JPH047843Y2 (de) * 1987-11-09 1992-02-28
US4840387A (en) * 1988-01-20 1989-06-20 The Jacobs Manufacturing Company Self-actuating keyless chuck
US5747334A (en) * 1990-02-15 1998-05-05 The University Of North Carolina At Chapel Hill Random peptide library
JP3043407B2 (ja) * 1990-02-15 2000-05-22 ザ ユニバーシティー オブ ノースカロライナ アット チャペル ヒル 完全合成アフィニティ試薬
DK0468128T3 (da) * 1990-07-21 1994-07-11 Roehm Guenter H Borepatron
DE4023303C1 (de) * 1990-07-21 1991-09-26 Guenter Horst 7927 Sontheim De Roehm
WO1992002626A1 (en) * 1990-08-06 1992-02-20 The Upjohn Company Eliminating internal initiation of soluble cd4 gene
JP2565469Y2 (ja) * 1990-09-28 1998-03-18 光陽産業 株式会社 フレキシブル管用継手
CN2579576Y (zh) * 2002-08-16 2003-10-15 周文华 改良的手紧钻夹头
CN2578022Y (zh) 2002-08-28 2003-10-08 周文华 一种改进的手紧钻夹头
CN100484674C (zh) * 2005-07-14 2009-05-06 山东威达机械股份有限公司 锁紧式钻夹头

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US4277074A (en) * 1979-11-26 1981-07-07 Harry Kilberis Keyless chuck
US4526497A (en) * 1982-03-15 1985-07-02 Hatfield Jim J Automatic jaw control for reversible power tool
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Cited By (115)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5234223A (en) * 1987-07-21 1993-08-10 Sakamaki Mfg. Co., Ltd. Chuck for tools
US5431420A (en) * 1989-12-11 1995-07-11 Jacobs Chuck Technology Corporation Non-impact keyless chuck
US6669207B2 (en) 1989-12-11 2003-12-30 Power Tool Holders Incorporated Non-impact keyless chuck
US5732956A (en) * 1989-12-11 1998-03-31 Power Tool Holders Incorporated Non impact keyless chuck
US5253879A (en) * 1989-12-11 1993-10-19 Jacobs Chuck Technology Corporation Non-impact keyless chuck
US5452906A (en) * 1989-12-11 1995-09-26 Jacobs Chuck Technology Corporation Non-impact keyless chuck
US6286842B1 (en) * 1989-12-11 2001-09-11 Power Tool Holders Incorporated Non-impact keyless chuck
US5924702A (en) * 1989-12-11 1999-07-20 Power Tool Holders Incorporated Non-impact keyless chuck
US7530576B2 (en) 1989-12-11 2009-05-12 Jacobs Chuck Manufacturing Company Non-impact keyless chuck
US5330204A (en) * 1989-12-11 1994-07-19 Jacobs Chuck Technology Corporation Non-impact keyless chuck
US5476273A (en) * 1989-12-11 1995-12-19 Power Tool Holders Incorporated Plastic grip boots for chucks
US7044480B2 (en) 1989-12-11 2006-05-16 Jacobs Chuck Manufacturing Company Non-impact keyless chuck
US5125673A (en) * 1989-12-11 1992-06-30 Huff Robert O Non-impact keyless chuck
US5573254A (en) * 1989-12-11 1996-11-12 Power Tool Holders Incorporated Non-impact keyless chuck
US20060202436A1 (en) * 1989-12-11 2006-09-14 The Jacobs Chuck Manufacturing Company Non-impact keyless chuck
US5183274A (en) * 1991-06-13 1993-02-02 Yukiwa Seiko Kabushikikaisya Chuck for tools
US5215317A (en) * 1992-05-18 1993-06-01 Jacobs Chuck Technology Corp. Keyless chuck
US5348317A (en) * 1993-08-13 1994-09-20 Jacobs Chuck Technology Corporation Chuck
US7452168B2 (en) 1993-08-13 2008-11-18 Jacobs Chuck Manufacturing Company Chuck
US5709392A (en) * 1993-08-13 1998-01-20 Power Tool Holders Incorporated Tool chuck
US20060119051A1 (en) * 1993-08-13 2006-06-08 Jacobs Chuck Manufacturing Company Chuck
US5501473A (en) * 1993-08-13 1996-03-26 Power Tool Holders Incorporated Chuck
US7018146B2 (en) 1993-08-13 2006-03-28 Jacobs Chuck Manufacturing Company Chuck
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Also Published As

Publication number Publication date
DE3874885T2 (de) 1993-03-18
KR890701259A (ko) 1989-12-19
EP0340310B1 (de) 1992-09-23
EP0340310A4 (en) 1990-09-26
WO1989003267A1 (en) 1989-04-20
JPH029517A (ja) 1990-01-12
DE3874885D1 (de) 1992-10-29
EP0340310A1 (de) 1989-11-08

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